// Copyright (c) 2012 - 2026 kio@little-bat.de
// BSD-2-Clause license
// https://opensource.org/licenses/BSD-2-Clause

#pragma once
#include "kio/kio.h"
#include <QBrush>
#include <QFont>
#include <QFontMetrics>
#include <QImage>
#include <QPainter>
#include <QPixmap>
#include <QSemaphore>
#include <QWidget>

namespace zxsp
{

enum {
	BOLD				= 1,
	UNDERLINE			= 2,
	INVERTED			= 4,
	ITALIC				= 8,
	OVERPRINT			= 16,
	DOUBLE_WIDTH		= 32,
	DOUBLE_HEIGHT		= 64,
	GRAPHICS_CHARACTERS = 128 // NIMP
};


class SimpleTerminal : public QWidget
{
	Q_OBJECT

public:
	int rows, cols;								  // size of terminal in character rows and columns
	int char_width,								  // width and ..
		line_height;							  // .. height of character cell
	int	   pointsize;							  // nominal font size [points]
	int	   ascent, descent, char_height, leading; // char_height = ascent+descent+1; line_height = char_height+leading
	QFont  font;								  // font to use
	QColor clear_color;							  // color used to clear background in scroll and clear commands
	QPainter* painter;							  // painter in use
	QPixmap*  canvas;

	QColor paper, pushed_paper; // paper color when printing in opaque mode
	QColor pen, pushed_pen;		// pen color for printing
	uint   attr, pushed_attr;	// print style
	int	   row, pushed_row;		// current print position
	int	   col, pushed_col;		// ""
	bool   blob, pushed_blob;	// cursor blob visible?

	void handle_h_overflow();
	void handle_v_overflow();
	void draw_text(QString);
	void set_colors();

	SimpleTerminal(QWidget* parent, QString fontname = "Menlo", int fontsize = 12, bool antialias = yes);
	~SimpleTerminal() override;

	void resize(int w, int h);
	void resize(const QSize& sz);

	void reset();
	void setAttributesTo(uint);
	void setAttributes(uint a) { setAttributesTo(attr | a); }
	void clearAttributes(uint a) { setAttributesTo(attr & ~a); }
	void clearAllAttributes() { setAttributesTo(0); }
	void setFont(QString name, int pointsize, bool antialias = yes);
	void setPaperColor(QColor);
	void setPenColor(QColor);

	void print(QString, int = 1);
	void print(QChar, int = 1);

	void printAt(int row, int col, QString, int = 1);
	void printAt(int row, int col, QChar, int = 1);

	void clearScreen();
	void moveTo(int row, int col);
	void moveToColumn(int col);
	void pushCursor();
	void popCursor();
	void showBlob();
	void hideBlob();
	void cursorLeft(int = 1);
	void cursorTab(int = 1);
	void cursorDown(int = 1);
	void cursorUp(int = 1);
	void cursorRight(int = 1);
	void cursorReturn();
	void clearToEndOfLine();
	void printGraphicsCharacter(uint16[], int = 1);
	void scrollScreen(int = 1);
	void clearRect(int rows, int cols);
	void copyRect(int dest_row, int dest_col, int rows, int cols);

private:
	void resize_canvas(int w, int h);

protected:
	void paintEvent(QPaintEvent*) override;	   // virtual protected
	void resizeEvent(QResizeEvent*) override;  // virtual protected
	void focusInEvent(QFocusEvent*) override;  // [virtual protected]
	void focusOutEvent(QFocusEvent*) override; // [virtual protected]

signals:
	void focusChanged(bool);

public slots:
};

} // namespace zxsp